=>
5. The students don't know how to do exercise given by the teacher yesterday.
6. The diagrams made by young Faraday were sent to Davy in 1982.
7. The gentleman living next door to me is a well-known orator.
8. All the astronauts orbiting the earth in space capsules are weightless.
9. All students not hading in their papers will fail in the exam. 
10. I saw many houses destroyed by the storm.
11. The street leading to the school is very wide.
12. The system used here is very successful.
13. Mr.John teaching my son is my neighbour.
14. Trains leaving from this station take an hour to get to London.
15. The candidates sitting for the exam are all from Vietnam.
16. We are driving on the road built in 1980.
17. Customers complaining about the service should see the manager.
18. The city destroyed during the war has now been rebuilt.
19. My brother meeting you yesterday works for a big firm.
20. The vegetable sold in this shop are grown without chemicals.